CA1201948A - Hydraulically operated fan assembly for a heat exchange - Google Patents
Hydraulically operated fan assembly for a heat exchangeInfo
- Publication number
- CA1201948A CA1201948A CA000415230A CA415230A CA1201948A CA 1201948 A CA1201948 A CA 1201948A CA 000415230 A CA000415230 A CA 000415230A CA 415230 A CA415230 A CA 415230A CA 1201948 A CA1201948 A CA 1201948A
- Authority
- CA
- Canada
- Prior art keywords
- assembly
- fan
- hydraulic pump
- fan assembly
- hydraulic
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
- F01P7/00—Controlling of coolant flow
- F01P7/02—Controlling of coolant flow the coolant being cooling-air
- F01P7/04—Controlling of coolant flow the coolant being cooling-air by varying pump speed, e.g. by changing pump-drive gear ratio
- F01P7/044—Controlling of coolant flow the coolant being cooling-air by varying pump speed, e.g. by changing pump-drive gear ratio using hydraulic drives
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
- F01P7/00—Controlling of coolant flow
- F01P7/02—Controlling of coolant flow the coolant being cooling-air
- F01P7/08—Controlling of coolant flow the coolant being cooling-air by cutting in or out of pumps
- F01P7/081—Controlling of coolant flow the coolant being cooling-air by cutting in or out of pumps using clutches, e.g. electro-magnetic or induction clutches
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Cooling, Air Intake And Gas Exhaust, And Fuel Tank Arrangements In Propulsion Units (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
- Power Steering Mechanism (AREA)
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
- Auxiliary Drives, Propulsion Controls, And Safety Devices (AREA)
Abstract
ABSTRACT
A fan assembly for a heat exchanger assembly associated with a vehicle having an internal combustion engine, includes a hydraulic motor including a drive shaft mounted proximate the heat exchanger assembly. A
fan is mounted on the drive shaft of the hydraulic motor and a hydraulic pump is mounted proximate and driven by the internal combustion engine. An electrically operated magnetic clutch assembly is disposed on the shaft of the hydraulic pump. Fluid conduit means including a reservoir is disposed between the hydraulic pump and said hydraulic motor. A switch means responsive to a preselect condition assumes an operative mode to activate the electrically operated magnetic clutch assembly thereby to cause the shaft of said hydraulic pump to rotate and effect fluid flow of hydraulic fluid from the hydraulic pump to the hydraulic motor and rotate the fan.
A fan assembly for a heat exchanger assembly associated with a vehicle having an internal combustion engine, includes a hydraulic motor including a drive shaft mounted proximate the heat exchanger assembly. A
fan is mounted on the drive shaft of the hydraulic motor and a hydraulic pump is mounted proximate and driven by the internal combustion engine. An electrically operated magnetic clutch assembly is disposed on the shaft of the hydraulic pump. Fluid conduit means including a reservoir is disposed between the hydraulic pump and said hydraulic motor. A switch means responsive to a preselect condition assumes an operative mode to activate the electrically operated magnetic clutch assembly thereby to cause the shaft of said hydraulic pump to rotate and effect fluid flow of hydraulic fluid from the hydraulic pump to the hydraulic motor and rotate the fan.
Description
~ YDRAULICALLY OPERATED FAN ASSEMBLY FO~ A HEAT EXCHANGE
Field of Invention This invention relates to a fan assembl~ :Eor cooling a fluid passing through a heat exchange, and more particularly to a fan assembly for a heat exchanger or radiator cooling a coolant circulating through an internal combustion engine.
Background of the Invention .
Internal combustion engines are maintained at oper-ating temperatures by circulating an intermediate heat trans-fer fluid or coolant, such as ethylene glycol, water or thelike through conduits or hoses disposed between the engine and a heat transfer assembly, commonly known as a radiator, wherein the heated coolant is passed through conduits in a core thereof and is cooled by ambient air passing through the radiator core in indirect heat transfer relationship to the coolant flowing through the conduitsO The coolant is permitted to flow through the radiator core and engine through such related conduits or hoses by the opening of a thermostat normally disposed in the internal combustion engine. Thus, coolant flow is permitted upon opening of the thermostat with the understanding that cooling flow may vary between no flow (closed) and full flow.
Similarly, freon ~or air conditioni.ng units are passed after compression through a heat exchanger to cool the compressed fluid prior to expansion into the heat exchanger through which air is passed in cooling heat transfer relationship.
Generally, to effect a flow of air through the radi-ator core sufficient to effecting cooling of the coolant, a fan assembly including at least a four blade fan configuration is provided on the engine side o~ the radiator to draw air therethrough, rotation of the farl blade being directly related ~12~ 3~
to the RPM's of the internal combustion engine. Thus, the slower the RPM's oE the engine, the slower is the rotation of the fan resulting in a smaller quantity o:E forced air flow.
- la -~.2~
There has previously been disclosed a fan assembly for a radiator comprised of a fan driven by an electric motor and formed of two blades of the axial flow, propeller type S-configuration wherein the radiator is disposed in a conventional manner forward of the au-tomobile engine.
Compactlon of the automobile has required relocation of -the heat exchange or radiator from such conventional position to alternate posit:ions consistent with reasonable fluid flow conditions for -the intermediate heat tansfer fluid. Thus~ the radiator may be mounted aside -the mo-tor, i.e. perpendicular to the conventional position, or in some other location on the vehicle. While conventional forward mounting of the fan assembly is adequate where natural convection conditions effec-t a heat transfer relationship or a result of the veloci-ty of the vehicle, alternate mounting of the heat exchanger or radiator necessitate a more positive flow of cooling air through the heat exchanger or radiator.
~Iydraulic fan assemblies ha~e found some usage and have been associated with an electrically or air operated flow divider. Flow dividers are very expensive and are constantly working under high pressures. When operation of the fan is required, the flow divider is closed thereby starting the fan motor. In such a system, -the hydraulic pump is constantly being turned by the engine thereby wasting energy and causing unnecessary wear and tear on the hydraulic pump. Additionally, such type of system requires a by-pass line to a reservoir to recycle hydraulic fluid since the hydraulic pump is in constant operation. Consequently, since the hydraulic pump is in cons-tant operativn, a heat exchanger is required to cool the hydraulic fluid.
I-t is an object of the present invention to provide 9~
a novel fan assembly for a radiator of an internal combustion engine of a vehicleO
The inven-tion provides a fan asembly for a hea-t exchanger assembly associated with a vehicle having an internal combustion engine, where:in a heat transfer Eluid is passed through said heat exchange:r assembly, ~hich com-prises: a hydraulic motor including a drive shaft mounted proximate said heat exchanger assembly; a fan mounted on said drive shaft of said hydraulic motor; a hydraulic pump including a shaf-t mounted proximate said internal combus-tion engine; an electrically operated magnetic clutch assembly disposed on said shaft of said hydraulic pump; fluid conduit means including a reservoir disposed between said hydraulic pump and said hydraulic motor; means for driving said hydraulic pump by said internal combustion engine; and a switch means responsive to a preselect condition to assume an operative mode to activate said electrically operated magnetic clutch assembly thereby to cause said shaEt of said hydraulic pump to rotate and effect fluid flow of hydraulic fluid from said hydraulic pump to said hydraulic motor thereby to rotate said fan~
The novel fan assembly for a radiator of an internal combustion engine of a vehicle provides for more positive flow o:E cooling air through -the radiator, even where the radiator is mounted in a non-conventional position.
The novel hydraulic fan assembly for a radiator o e an internal.combustion engine of a vehicle can eliminate heat exchange requirements for hydraulic fluid, and permit improved fuel efficiency, reduce engine noises and efficacious monitoring of e:ngine compartment temperature.
~RIEF DESCRIPTION OF T~IE DRAWINGS
These and o-ther aspects O:e the present invention 1~, ~_ 3 _ ~z~
will become clear by reference to the -following detailed description when taken witll the accompanying drawings where like numerals designate like par-ts throughout and wherein:
3a -~ ~3~
Figure 1 ts a plan side view of a radiator and Ean assembly of the present invention; and Figure 2 is an enlarged, partial cross-sectional view of the hydraulic motor;
Detailed Description of the Draw]nq Referring now -to the drawings, there is illustrated a radiator assembly, generally indicated as 10, for an internal combustion engine of a vehicle having a coolant inlet conduit 12 and coolant outlet conduit 14. In the i.nterest of clarity, the radiator assembly 10 is illustrated as being generally conventional mounted, with the broken lines indica-ting that positioning of the radiator may be other then in such a con-ventional mounting configuration.
Disposed between the radiator assembly 10 and the internal combustion engine, there is provided a fan assembly, generally indicated as 16, comprised of a hydraulic pump 18 and a hydraulic motor 20 in hydraulic fluid flow communication via conduits 22 and 24 and reservoir 25. The hydraulic pump 18 including a shaft 26 is mounted, such as by stud assemblies 28, to a support plate 30 mounted by a bracket 31 to the internal combustion engine. The plate 30 is formed with an orific~ 32 and is provided with a bearing 34 in which the shaft 26 of the hydraulic motor 18 is mounted for rotation~ On the shaft 26, there is mounted a magnetically operated clutch assembly, gen-- erally indieated as 36, including a plllley wheel 38 as known to one skilled in the art. An endless belt 40 is coursed about the pulley wheel 38 and about a pulled wheel 42 mounted on a crank shaft 44 of the engine of the vehicle.
The hydraulic motor 20 including a shaft 46 is mounted, such as by stud assemblies 48, to a support plate 50 formed with an orifice 52 and provided with a bearing 54 in ~ ~C7~
~L ~ ~ .J
which shaft ~6 is mounted for rotation. A fan 56 is mounted on the shaft 46 of the hydraulic motor 20 and is illustrated as being of the two blades axial flow, propeller type S-con-figuration; although other fan blade configurations are contem-plated. The support plate 50 including hydraulic motor 20 and fan 56 is disposed proximate the radiator assembly 10 of the automobile by spacer elements 58 for positioning support bars 60 to which the support plate 50 is mounted, such as by bolt and stud assemblies 62.
The fan assembly 16 includes a thermostatic switch 64 connec-ted to a positive power source by line 66, preferably positioned in the lower conduit 12 for more accura-te temperature sensing.
The thermostatic switch 64 is preferably selected to respond to a closed mode to a coolant temperature of from 180 to 190F., and to respond to a opened mode at a coolant temper-ature of from 165 to 175F, whether or not an engine thermostat (no-t shown) is provided in the internal combustion engine.
Generally, thermo stats used have an operational temperature of about 192F. to minimize pollutant introduction into the atmosphere. The thermostatic switch 64 is connected by line 60 to the electrically-operated magnetic clutch assembly 36. The electrically-operated magnetic clutch assembly 36 is grounded by attaching it to the frame of vehicle.
In operation, upon keying the ignition switch (not shown) of the vehicle provided with the fan assembly 16 of the present invention, the hydraulic mo-tor 13 is in a disabled state and remains in such state until the temperature of the coolant reaches a predetermined temperature, e.g. lg5F. sensed by the thermostatic switch 64 at which point the thermostatic switch 64 closes completing a circuit via the battery 66 thereby energizing the electrically-operated magnetic clutch 36 thereby causing the shaft 26 of the hydraulic pump 18 to rotate and cause hydraulic fluid -to be discharged under pressure through line 22. Such flow of fluid in line 22 causes the shaft 46 of the hydraulic motor 20 to rotate in a clockwise direc-tion when viewed in -the direction of arrow A and thus caused the fan 56 attached thereto to rotate in a c:lockwise direction thereby causing air to be drawn through t:he radiator 10 as indicated by t.he arrows B.
The thermostatic switch 64 remains closed until a predetermined lower temperature is reached, e.g. 165F. caused for example by exceeding about 20 to 30 miles per hour for extended time periods, if the radiator is disposed in a con-vention position whereby forced convection through the radiator is sufficient to maintain the coolant temperature at the desired operating level, at which point the thermostatic switch 46 opens thereby disengaging the electrically operated magnetic clutch 36 to place the system in an OFF mode. It will be understood by one skilled in the art that alternate positioning of the radia~
tor will effect switching of the thermostatic switch 64.
As hereinabove mentioned, the radiator assembly 10 of the vehicle may be disposed at any convenient position on the vehicle, and generally conventionally in front of the engine.
Generally, the fan 56 of the fan assembly 16 is mounted between the radiator assembly 10 and internal combustion engine whereby clockwise rotation of the fan 56 of the fan assembly 16 draws air through the radiator 10 although the fan 56 and hydraulic motor 20 of the present invention may be mounted in front of the radiator to push air through the radiator. It is readily appre-ciated that under sustained driving conditions wherein the radiator is conventionally mounted and the vehicle exceeds a speed of about 20 to 30 miles per hour the switch 64 and the -~2~
hydraulic motor 22 will be disabled and the fan 56 is permitted to rotate by the passage oE forced air. Energy savings are realized dependent on the energy required to rotate a belt driven fan which when converted to an increase in fuel economy amounts to up to 15 percent or more, since the hydraulic fan assembly 16 of the present invention is operated only on a when-needed basis.
The fan assembly of the present invention may be included as oriqinal equipment on the vehicle or may replace an existing unit. Aclditionally, the fan assembly of the pres-ent invention may be used as original or replacement equipment in conjunction with heat exchangers requiring forced convec-tion to cool a fluid, such as oil, or an intermediate heat transfer ~luid, such as freon, for air conditioners, refriger ators, and the like. Thus, the fan assembly of the present invention is mounted proximate to the heat exchanger preferably in a position to draw air through the heat exchanger with -the thermostatic switch being responsive to preselect temperature levels with the hydraulic pump being driven by belt drive with the crankshaft.
While the invention has been described in connection with several exemplary embodiments thereof, it will be under-stood that many modifications will be apparent to those of ordinary skill in the art; and that thi.s application is intended to cover any adaptations or variations thereof. Therefore, it is manifestly intended that this i.nvention be only limited by the claims and the equivalents thereof.
Field of Invention This invention relates to a fan assembl~ :Eor cooling a fluid passing through a heat exchange, and more particularly to a fan assembly for a heat exchanger or radiator cooling a coolant circulating through an internal combustion engine.
Background of the Invention .
Internal combustion engines are maintained at oper-ating temperatures by circulating an intermediate heat trans-fer fluid or coolant, such as ethylene glycol, water or thelike through conduits or hoses disposed between the engine and a heat transfer assembly, commonly known as a radiator, wherein the heated coolant is passed through conduits in a core thereof and is cooled by ambient air passing through the radiator core in indirect heat transfer relationship to the coolant flowing through the conduitsO The coolant is permitted to flow through the radiator core and engine through such related conduits or hoses by the opening of a thermostat normally disposed in the internal combustion engine. Thus, coolant flow is permitted upon opening of the thermostat with the understanding that cooling flow may vary between no flow (closed) and full flow.
Similarly, freon ~or air conditioni.ng units are passed after compression through a heat exchanger to cool the compressed fluid prior to expansion into the heat exchanger through which air is passed in cooling heat transfer relationship.
Generally, to effect a flow of air through the radi-ator core sufficient to effecting cooling of the coolant, a fan assembly including at least a four blade fan configuration is provided on the engine side o~ the radiator to draw air therethrough, rotation of the farl blade being directly related ~12~ 3~
to the RPM's of the internal combustion engine. Thus, the slower the RPM's oE the engine, the slower is the rotation of the fan resulting in a smaller quantity o:E forced air flow.
- la -~.2~
There has previously been disclosed a fan assembly for a radiator comprised of a fan driven by an electric motor and formed of two blades of the axial flow, propeller type S-configuration wherein the radiator is disposed in a conventional manner forward of the au-tomobile engine.
Compactlon of the automobile has required relocation of -the heat exchange or radiator from such conventional position to alternate posit:ions consistent with reasonable fluid flow conditions for -the intermediate heat tansfer fluid. Thus~ the radiator may be mounted aside -the mo-tor, i.e. perpendicular to the conventional position, or in some other location on the vehicle. While conventional forward mounting of the fan assembly is adequate where natural convection conditions effec-t a heat transfer relationship or a result of the veloci-ty of the vehicle, alternate mounting of the heat exchanger or radiator necessitate a more positive flow of cooling air through the heat exchanger or radiator.
~Iydraulic fan assemblies ha~e found some usage and have been associated with an electrically or air operated flow divider. Flow dividers are very expensive and are constantly working under high pressures. When operation of the fan is required, the flow divider is closed thereby starting the fan motor. In such a system, -the hydraulic pump is constantly being turned by the engine thereby wasting energy and causing unnecessary wear and tear on the hydraulic pump. Additionally, such type of system requires a by-pass line to a reservoir to recycle hydraulic fluid since the hydraulic pump is in constant operation. Consequently, since the hydraulic pump is in cons-tant operativn, a heat exchanger is required to cool the hydraulic fluid.
I-t is an object of the present invention to provide 9~
a novel fan assembly for a radiator of an internal combustion engine of a vehicleO
The inven-tion provides a fan asembly for a hea-t exchanger assembly associated with a vehicle having an internal combustion engine, where:in a heat transfer Eluid is passed through said heat exchange:r assembly, ~hich com-prises: a hydraulic motor including a drive shaft mounted proximate said heat exchanger assembly; a fan mounted on said drive shaft of said hydraulic motor; a hydraulic pump including a shaf-t mounted proximate said internal combus-tion engine; an electrically operated magnetic clutch assembly disposed on said shaft of said hydraulic pump; fluid conduit means including a reservoir disposed between said hydraulic pump and said hydraulic motor; means for driving said hydraulic pump by said internal combustion engine; and a switch means responsive to a preselect condition to assume an operative mode to activate said electrically operated magnetic clutch assembly thereby to cause said shaEt of said hydraulic pump to rotate and effect fluid flow of hydraulic fluid from said hydraulic pump to said hydraulic motor thereby to rotate said fan~
The novel fan assembly for a radiator of an internal combustion engine of a vehicle provides for more positive flow o:E cooling air through -the radiator, even where the radiator is mounted in a non-conventional position.
The novel hydraulic fan assembly for a radiator o e an internal.combustion engine of a vehicle can eliminate heat exchange requirements for hydraulic fluid, and permit improved fuel efficiency, reduce engine noises and efficacious monitoring of e:ngine compartment temperature.
~RIEF DESCRIPTION OF T~IE DRAWINGS
These and o-ther aspects O:e the present invention 1~, ~_ 3 _ ~z~
will become clear by reference to the -following detailed description when taken witll the accompanying drawings where like numerals designate like par-ts throughout and wherein:
3a -~ ~3~
Figure 1 ts a plan side view of a radiator and Ean assembly of the present invention; and Figure 2 is an enlarged, partial cross-sectional view of the hydraulic motor;
Detailed Description of the Draw]nq Referring now -to the drawings, there is illustrated a radiator assembly, generally indicated as 10, for an internal combustion engine of a vehicle having a coolant inlet conduit 12 and coolant outlet conduit 14. In the i.nterest of clarity, the radiator assembly 10 is illustrated as being generally conventional mounted, with the broken lines indica-ting that positioning of the radiator may be other then in such a con-ventional mounting configuration.
Disposed between the radiator assembly 10 and the internal combustion engine, there is provided a fan assembly, generally indicated as 16, comprised of a hydraulic pump 18 and a hydraulic motor 20 in hydraulic fluid flow communication via conduits 22 and 24 and reservoir 25. The hydraulic pump 18 including a shaft 26 is mounted, such as by stud assemblies 28, to a support plate 30 mounted by a bracket 31 to the internal combustion engine. The plate 30 is formed with an orific~ 32 and is provided with a bearing 34 in which the shaft 26 of the hydraulic motor 18 is mounted for rotation~ On the shaft 26, there is mounted a magnetically operated clutch assembly, gen-- erally indieated as 36, including a plllley wheel 38 as known to one skilled in the art. An endless belt 40 is coursed about the pulley wheel 38 and about a pulled wheel 42 mounted on a crank shaft 44 of the engine of the vehicle.
The hydraulic motor 20 including a shaft 46 is mounted, such as by stud assemblies 48, to a support plate 50 formed with an orifice 52 and provided with a bearing 54 in ~ ~C7~
~L ~ ~ .J
which shaft ~6 is mounted for rotation. A fan 56 is mounted on the shaft 46 of the hydraulic motor 20 and is illustrated as being of the two blades axial flow, propeller type S-con-figuration; although other fan blade configurations are contem-plated. The support plate 50 including hydraulic motor 20 and fan 56 is disposed proximate the radiator assembly 10 of the automobile by spacer elements 58 for positioning support bars 60 to which the support plate 50 is mounted, such as by bolt and stud assemblies 62.
The fan assembly 16 includes a thermostatic switch 64 connec-ted to a positive power source by line 66, preferably positioned in the lower conduit 12 for more accura-te temperature sensing.
The thermostatic switch 64 is preferably selected to respond to a closed mode to a coolant temperature of from 180 to 190F., and to respond to a opened mode at a coolant temper-ature of from 165 to 175F, whether or not an engine thermostat (no-t shown) is provided in the internal combustion engine.
Generally, thermo stats used have an operational temperature of about 192F. to minimize pollutant introduction into the atmosphere. The thermostatic switch 64 is connected by line 60 to the electrically-operated magnetic clutch assembly 36. The electrically-operated magnetic clutch assembly 36 is grounded by attaching it to the frame of vehicle.
In operation, upon keying the ignition switch (not shown) of the vehicle provided with the fan assembly 16 of the present invention, the hydraulic mo-tor 13 is in a disabled state and remains in such state until the temperature of the coolant reaches a predetermined temperature, e.g. lg5F. sensed by the thermostatic switch 64 at which point the thermostatic switch 64 closes completing a circuit via the battery 66 thereby energizing the electrically-operated magnetic clutch 36 thereby causing the shaft 26 of the hydraulic pump 18 to rotate and cause hydraulic fluid -to be discharged under pressure through line 22. Such flow of fluid in line 22 causes the shaft 46 of the hydraulic motor 20 to rotate in a clockwise direc-tion when viewed in -the direction of arrow A and thus caused the fan 56 attached thereto to rotate in a c:lockwise direction thereby causing air to be drawn through t:he radiator 10 as indicated by t.he arrows B.
The thermostatic switch 64 remains closed until a predetermined lower temperature is reached, e.g. 165F. caused for example by exceeding about 20 to 30 miles per hour for extended time periods, if the radiator is disposed in a con-vention position whereby forced convection through the radiator is sufficient to maintain the coolant temperature at the desired operating level, at which point the thermostatic switch 46 opens thereby disengaging the electrically operated magnetic clutch 36 to place the system in an OFF mode. It will be understood by one skilled in the art that alternate positioning of the radia~
tor will effect switching of the thermostatic switch 64.
As hereinabove mentioned, the radiator assembly 10 of the vehicle may be disposed at any convenient position on the vehicle, and generally conventionally in front of the engine.
Generally, the fan 56 of the fan assembly 16 is mounted between the radiator assembly 10 and internal combustion engine whereby clockwise rotation of the fan 56 of the fan assembly 16 draws air through the radiator 10 although the fan 56 and hydraulic motor 20 of the present invention may be mounted in front of the radiator to push air through the radiator. It is readily appre-ciated that under sustained driving conditions wherein the radiator is conventionally mounted and the vehicle exceeds a speed of about 20 to 30 miles per hour the switch 64 and the -~2~
hydraulic motor 22 will be disabled and the fan 56 is permitted to rotate by the passage oE forced air. Energy savings are realized dependent on the energy required to rotate a belt driven fan which when converted to an increase in fuel economy amounts to up to 15 percent or more, since the hydraulic fan assembly 16 of the present invention is operated only on a when-needed basis.
The fan assembly of the present invention may be included as oriqinal equipment on the vehicle or may replace an existing unit. Aclditionally, the fan assembly of the pres-ent invention may be used as original or replacement equipment in conjunction with heat exchangers requiring forced convec-tion to cool a fluid, such as oil, or an intermediate heat transfer ~luid, such as freon, for air conditioners, refriger ators, and the like. Thus, the fan assembly of the present invention is mounted proximate to the heat exchanger preferably in a position to draw air through the heat exchanger with -the thermostatic switch being responsive to preselect temperature levels with the hydraulic pump being driven by belt drive with the crankshaft.
While the invention has been described in connection with several exemplary embodiments thereof, it will be under-stood that many modifications will be apparent to those of ordinary skill in the art; and that thi.s application is intended to cover any adaptations or variations thereof. Therefore, it is manifestly intended that this i.nvention be only limited by the claims and the equivalents thereof.
Claims (10)
PROPERTY OR PRIVILEGE IS CLAIMED ARE DEFINED AS FOLLOWS:
1. A fan assembly for a heat exchanger assembly associ-ated with a vehicle having an internal combustion engine, where-in a heat transfer fluid is passed through said heat exchanger assembly, which comprises:
a hydraulic motor including a drive shaft mounted proximate said heat exchanger assembly;
a fan mounted on said drive shaft of said hydraulic motor;
a hydraulic pump including a shaft mounted proximate said internal combustion engine;
an electrically operated magnetic clutch assembly disposed on said shaft of said hydraulic pump;
fluid conduit means including a reservoir disposed between said hydraulic pump and said hydraulic motor;
means for driving said hydraulic pump by said internal combustion engine; and a switch means responsive to a preselect condition to assume an operative mode to activate said electrically operated magnetic clutch assembly thereby to cause said shaft of said hydraulic pump to rotate and effect fluid flow of hydraulic fluid from said hydraulic pump to said hydraulic motor thereby to rotate said fan.
a hydraulic motor including a drive shaft mounted proximate said heat exchanger assembly;
a fan mounted on said drive shaft of said hydraulic motor;
a hydraulic pump including a shaft mounted proximate said internal combustion engine;
an electrically operated magnetic clutch assembly disposed on said shaft of said hydraulic pump;
fluid conduit means including a reservoir disposed between said hydraulic pump and said hydraulic motor;
means for driving said hydraulic pump by said internal combustion engine; and a switch means responsive to a preselect condition to assume an operative mode to activate said electrically operated magnetic clutch assembly thereby to cause said shaft of said hydraulic pump to rotate and effect fluid flow of hydraulic fluid from said hydraulic pump to said hydraulic motor thereby to rotate said fan.
2. The fan assembly as defined in Claim 1 wherein said heat exchanger assembly is a radiator assembly for cooling a heat transfer fluid being passed through said internal com-bustion engine and said switch means is a thermostatic switch responsive to a preselect upper temperature level.
3. The fan assembly as defined in Claim 2 wherein said fan assembly is mounted between said radiator assembly and said internal combustion engine and said fan is caused to rotate to draw air through said radiator assembly.
4. The fan assembly as defined in Claim 2 wherein said thermostatic switch is disposed in said outlet conduit of said radiator assembly.
5. The fan assembly as defined in Claim 2 wherein said preselect upper temperature level is of from 160 to 200°F.
6. The fan assembly as defined in Claim 2 wherein said thermostatic switch is placed in said operative mode at a temperature of from 180 to 190°F. and in an inoperative mode at a temperature of 165 to 175°F.
7. The fan assembly as defined in Claims 1 or 2 wherein said support means includes a plate member formed with an orifice and having a bearing mounted therein for receiving said drive shaft of said hydraulic motor.
8. The fan assembly as defined in Claims 1 or 2 wherein said shaft of said hydraulic pump is positioned in a bearing disposed in an orifice of a plate member.
9. The fan assembly as defined in Claim 1 wherein said magnetic clutch assembly includes a pulley and said internal combustion engine is provided with a pulley, said assembly further including belt means disposed about said pulleys.
10. The fan assembly as defined in Claim 9 wherein said switch is a thermostatic switch responsive to a preselect upper temperature level.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US320,886 | 1981-11-13 | ||
| US06/320,886 US4366783A (en) | 1981-11-13 | 1981-11-13 | Hydraulically operated fan assembly for a heat exchanger assembly |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1201948A true CA1201948A (en) | 1986-03-18 |
Family
ID=23248248
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000415230A Expired CA1201948A (en) | 1981-11-13 | 1982-11-09 | Hydraulically operated fan assembly for a heat exchange |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US4366783A (en) |
| EP (1) | EP0079829B1 (en) |
| JP (1) | JPS5891323A (en) |
| AT (1) | ATE41976T1 (en) |
| CA (1) | CA1201948A (en) |
| DE (2) | DE3279593D1 (en) |
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| US4539943A (en) * | 1983-09-20 | 1985-09-10 | Aisin Seiki Kabushiki Kaisha | Engine cooling system |
| US4875521A (en) * | 1987-02-27 | 1989-10-24 | Roger Clemente | Electric fan assembly for over-the-road trucks |
| DE4336892A1 (en) * | 1992-10-29 | 1994-05-05 | Aisin Seiki | Oil pressure drive for vehicle with hydraulic steering and engine cooling - has engine-driven variable delivery pump supplying steering servo and hydraulically impelled engine cooling fan via distributor valve |
| DE4316339A1 (en) * | 1993-05-15 | 1994-11-17 | Teves Gmbh Alfred | Pressure-medium supply device |
| EP0794745B1 (en) * | 1994-11-30 | 2004-09-01 | Implant Innovations, Inc. | Implant surface preparation |
| US5960748A (en) | 1997-05-02 | 1999-10-05 | Valeo, Inc. | Vehicle hydraulic component support and cooling system |
| US5875630A (en) * | 1997-06-10 | 1999-03-02 | Sauer Inc. | Hydraulic drive assembly |
| US7000575B2 (en) * | 2004-06-02 | 2006-02-21 | Generac Power Systems, Inc. | Method and apparatus for reducing fan noise in an electrical generator |
| JP4523362B2 (en) * | 2004-08-20 | 2010-08-11 | 本田技研工業株式会社 | Fuel cell vehicle |
| US7177151B2 (en) * | 2004-09-15 | 2007-02-13 | Lockheed Martin Corporation | Cooling devices and systems |
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|---|---|---|---|---|
| GB1095515A (en) * | 1900-01-01 | |||
| US3120219A (en) * | 1959-05-27 | 1964-02-04 | Daimler Benz Ag | Fan drive arrangement |
| NL294869A (en) * | 1963-06-06 | |||
| GB1284904A (en) * | 1969-07-15 | 1972-08-09 | Rolls Royce | Drive means for the cooling fan of an internal combustion engine |
| US3853098A (en) * | 1972-10-05 | 1974-12-10 | Nippon Denso Co | Driving system for automobile engine cooling fan |
| US3942486A (en) * | 1974-08-21 | 1976-03-09 | The United States Of America As Represented By The Secretary Of The Army | Hydraulic fan drive system speed control |
| US4062329A (en) * | 1976-07-29 | 1977-12-13 | The United States Of America As Represented By The Secretary Of The Army | Fan drive system |
| US4223646A (en) * | 1978-02-16 | 1980-09-23 | Trw Inc. | Hydraulic fan drive system |
| FR2476208A2 (en) * | 1979-03-20 | 1981-08-21 | Delti | EM clutch for pulley driven engine radiator cooling fan - is displaced w.r.t. engine drive shaft in order to be opposite radiator and is driven by belt and pulley system |
-
1981
- 1981-11-13 US US06/320,886 patent/US4366783A/en not_active Expired - Fee Related
-
1982
- 1982-11-09 CA CA000415230A patent/CA1201948A/en not_active Expired
- 1982-11-10 DE DE8282402062T patent/DE3279593D1/en not_active Expired
- 1982-11-10 AT AT82402062T patent/ATE41976T1/en active
- 1982-11-10 EP EP82402062A patent/EP0079829B1/en not_active Expired
- 1982-11-10 DE DE198282402062T patent/DE79829T1/en active Pending
- 1982-11-12 JP JP57198810A patent/JPS5891323A/en active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| EP0079829A1 (en) | 1983-05-25 |
| JPS5891323A (en) | 1983-05-31 |
| US4366783A (en) | 1983-01-04 |
| DE79829T1 (en) | 1983-12-08 |
| EP0079829B1 (en) | 1989-04-05 |
| ATE41976T1 (en) | 1989-04-15 |
| DE3279593D1 (en) | 1989-05-11 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |